Synthesis and Chemistry of Unusual Bicyclic Endoperoxides Containing the Pyridazine Ring
作者:Galip Özer、Nurullah Saraçoǧlu、Metin Balci
DOI:10.1021/jo0345300
日期:2003.9.1
Inverse-Diels-Alder reaction of dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate with unsaturated bicyclic endoperoxides gave the bicyclic endoperoxides containing the pyridazine ring. The NEt(3) and CoTPP (TPP = tetraphenylporphyrin) catalyzed reaction of endoperoxide 8 resulted in the formation of hydroxy ketone 11 and cis-diol 9. Cleavage of the peroxide linkage in 8 with thiourea provided cis-diol
1,2,4,5-四嗪-3,6-二羧酸二甲酯与不饱和双环内过氧化物的Diels-Alder逆反应得到含有哒嗪环的双环内过氧化物。NEt(3)和CoTPP(TPP =四苯基卟啉)催化的内过氧化物8导致羟基酮11和顺式二醇9的形成。用硫脲将8中的过氧化物键裂解提供了顺式二醇9。羟基酮的氧化11和顺式二醇9生成5,8-二苯并二氮杂萘10。此外,其他内过氧化物19、20、22、23和30的各种转化导致哒嗪衍生物的形成。